The omitted-argument condition determines whether an argument was provided to a function, method, or program.
                  
 
            
            
               General Format 
 
               	  
               	 data-name-1 IS [ NOT ] OMITTED
 
                 
            
            
               Syntax Rules 
 
               	  
                
                  	 
                  - Data-name-1 must be a formal parameter defined in the source element in which this condition is specified. 
                     	 
                  
  
               
 
               
              
            
            
               General Rules 
 
               	  
                
                  	 
                  - The result of the OMITTED test is true if one of the following conditions applies: 
                     		
                     
 
                        		  
                        - If the OMITTED phrase, rather than an identifier or literal, is specified as the argument corresponding to data-name-1 in
                           the statement that activated this program, function, or method 
                           		  
                        
  
                        		  
                        - The argument corresponding to data-name-1 was a trailing argument that was omitted from the activating statement 
                           		  
                        
  
                        		  
                        - If the argument corresponding to data-name-1 is itself a formal parameter for which the omitted-argument condition is true.
                           
                           		  
                        
  
                        		
                     
                     	 
                    
                  	 
                  - When used, NOT and the keyword OMITTED specify one condition to be executed for truth values.